{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the validity of gas determined in a blockchain transaction?","a":"Precompilation: Firstly, smart contracts need to be precompiled before deploying them to the Ethereum network. The precompilation process converts the code in the smart contract into  OPCODES, which represent basic operations in the contract, such as ADD, SUB, MUL, DIV, etc. Each OPCODE has a fixed gas cost."}]}],"pr":"80aeb71408417f3bdc8208038d53efc5fafa4142b172aaa537f133386d8820c9"}